Steam-generator.



W. H. STEWART.

STEAM GENERATOR.

APPLICATION IILIII) NOV.4,1910.

1,041,188. I Patented 001;. 15, 1912.

2 SHEETSSHEET 1.

flms'ses: w 177118117013 W. H. STEWART.

STEAM GENERATOR.

APPLICATION FILED NOV. 4, 1910,

1 041 188 Patented Oct. 15, 1912.

2 SHEETS-SHEET 2.

V Minna ex.- Im/eu far WILLIAM H. STEWART, OF KANSAS CITY, KANSAS.

STEAM-GENERATOR.

Specification of Letters Patent.

Patented Oct. 15,1912.

Application filed November 4, 1910. Serial No. 590,771.

To all whom it may concern:

Be it known that I, WILLIAM H. S'TIPW- ART, a citizen of the United States, residlng at Kansas City, in the county of Wyandotte and State of Kansas, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification.

My invention relates to improvements in steam-generators, and one of my objects is to obtain equal expansion throughout the len h and circumference of the generatolllrshe l, and avoid rupture thereof by und e expansion at one or more points.

' Another object is to obtain greater evaporative efiiciency with a given amount of fuel than heretofore, so that high pressure steam may be generated for commercial purposes more economically than by the methods now in general use.

A. further object is to overcome priming and its consequent danger to the engine drawing its supply of steam from the generator.

Another objectis to keep the interior of the generator-shell free from incrustation and the attendant evils thereof.

I attain the foregoing objects by keeping the feed-water free of contact with the generator-shell and. the fire tubes therein, and discharging said water directly into a receptacle within the shell. Thus relieved of the cooling effect of the customary surrounding body of water, radiation from the firetubes at the highest possible temperature uniformly heats the air in the generator to a high degree, and insures rapid evaporation of the water in the receptacle.

Referring now to the accompanying drawings which show the preferred embodiment of my invention, Figure 1 is a vertical longitudinal section of the generator on line I-I of Fig. 4. Fig. 2 is a horizontal longitudinal section on line IIII of Fig. 3.

Fig. 3 is a front elevation of the generator.

Fig. 4 is a transverse section on line IVIV of Fig. 1.

1 designates the tubular shell of the generator closed at-itsends by heads 2 and 3, removably-secured in position by screws 4. Head 2 is provided with a manhole 5, whereby access may be had to the interior of the generator.

' As shown in the drawings, the generator is internally fired, the means for this purpose comprising a pair of large fire-tubes 6, leading inward through head 3, aplurality of small fire-tubes 7, leading outward through header 3, a manifold 8, connecting the firetubes 6 and 7, and burners 9, extending into the large fire-tubes 6.

Fire-tubes 6, are spaced above the bottom of shell 1, by saddles 10, which also assist header 3 in supporting said fire-tubes.

11 designates a receptacle for the feedwater supplied thereto through a pipe 12, preferably entering thev generator through the steam-dome 13, thereof. Receptacle 11 is supported by a lurality of brackets 14, resting upon the Ere-tubes 6. As shown, receptacle 11 is open at its top, and the upper portions of its sides are braced by a bridge 15, which also supports the small fire-tubes 7. A plurality of tubes 16, extend transversely through the receptacle for the passage of ste'am to accelerate evaporation of the feed-water.

17 designates a' valve-controlled outlet pipe for drawing off the condensed steam which collects in the generator when fuel to burner 9 is cut off.

18 designates an insulating covering for the exterior of shell 1, to prevent loss of heat from the interior steam surface thereof.

Receptacle 11, containing the feed-water, being located about centrally of the chamber formed by shell 1, and heads 2 and 3, is surrounded by high temperature, steamwhich also passes through tubes 16, and insures rapid 'conversion of the feed-water into steam, maintained at high temperature by direct radiation from the fire-tubes. The large steam space between the surface of the feed-water and the steam outlet 13, prevents siphoning of the feed-water through said outlet. All impurities separated from the feed-water are precipitated to the bottom of the receptacle, instead of incrusting the shell or collecting on the fire-tubes and interfering with the radiation of heat therefrom.

Having thus described my invention what I claim, and desire to secure by Letters Patent, is:

1. A generator embracin a steam-chamher, a water receptacle within said steam chamber, communicating with a source of supply and opening into the chamber to discharge steam therein, and a heater within said steam chamber free of contact with the water.

2. A generator embracing a'steam-chamher, a water receptacle within said chamber,

tubes extending t and surrounded on all sides by steam-space and opening at the top to discharge steam into said space, and evaporating means within said chamber.

3. A generator embracing a steam chamber, a water rece tacle within said chamber, hrough said receptacle, and

evaporating means in said steam chamber.

4. A generator embracing a steam-cham- 10 ber, fire-tubes leading into said steam chamber, fire-tubes leading from said steam chamber, and a Water-receptacle resting on the first-mentioned fire-tubes.

In testimony whereof I affix my signature in the presence of two witnesses.

WILLIAM H. STEWART.

Witnesses F. G. FISCHER, E. C. LILLIAN. 

